CN220122031U - Moisture-proof explosion-proof valve for power battery pack - Google Patents
Moisture-proof explosion-proof valve for power battery pack Download PDFInfo
- Publication number
- CN220122031U CN220122031U CN202320864540.9U CN202320864540U CN220122031U CN 220122031 U CN220122031 U CN 220122031U CN 202320864540 U CN202320864540 U CN 202320864540U CN 220122031 U CN220122031 U CN 220122031U
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- CN
- China
- Prior art keywords
- proof
- battery pack
- moisture
- explosion
- power battery
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims abstract description 37
- 239000000741 silica gel Substances 0.000 claims abstract description 37
- 229910002027 silica gel Inorganic materials 0.000 claims abstract description 37
- 238000009423 ventilation Methods 0.000 claims abstract description 26
- 239000012528 membrane Substances 0.000 claims abstract description 16
- 238000007789 sealing Methods 0.000 claims description 21
- 230000006835 compression Effects 0.000 claims description 6
- 238000007906 compression Methods 0.000 claims description 6
- 238000004880 explosion Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 9
- 230000002776 aggregation Effects 0.000 abstract description 3
- 238000004220 aggregation Methods 0.000 abstract description 3
- 230000004048 modification Effects 0.000 description 3
- 238000012986 modification Methods 0.000 description 3
- 230000004888 barrier function Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 229920001296 polysiloxane Polymers 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 230000000241 respiratory effect Effects 0.000 description 1
Landscapes
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model discloses a moisture-proof and explosion-proof valve for a power battery pack, which comprises a main body and a push rod assembly, wherein the push rod assembly is arranged in a valve body and is connected through a spring, the push rod assembly comprises an end cover and a push rod, the end cover is in threaded connection with the push rod, the end cover is connected with the push rod to form a ventilation channel, a silica gel valve plate positioned on the ventilation channel is arranged in the end cover, the silica gel valve plate is provided with an opening and closing seam, and the opening and closing seam is in a closing state when the air pressures at two sides of the silica gel valve plate are balanced; when the air pressure at two sides of the silica gel valve plate is different, the opening and closing seam is in an open state, and a ventilated membrane positioned above the silica gel valve plate is arranged in the end cover. Through the mode, the moisture-proof explosion-proof valve for the power battery pack is provided with the silica gel valve on the ventilation channel, and the silica gel valve is opened to realize gas circulation only under the condition that pressure difference exists on two sides of the silica gel valve, so that water vapor is prevented from entering the inside through the ventilation membrane, and condensed water aggregation in the closed cavity is reduced.
Description
Technical Field
The utility model relates to the field of balance valves, in particular to a moisture-proof explosion-proof valve for a power battery pack.
Background
In the field of power batteries, the pressure difference exists between the inside and the outside of the battery due to self heating and cooling of the battery and the change of the temperature of the external environment, so that the respiratory effect is generated and the sealing performance of the battery is influenced.
The existing explosion-proof valve generally comprises a valve body and a push rod, the valve body and the push rod are sealed and connected through a spring, a breathable film is arranged on the push rod, gas exchange is achieved through the breathable film, but continuous flow of gas can lead to entry of water vapor, so that accumulation of the water vapor in the valve body is caused, and safety performance of a battery pack is affected.
Disclosure of Invention
The utility model mainly solves the technical problem of providing the moisture-proof explosion-proof valve for the power battery pack, wherein the silica gel valve is arranged on the ventilation channel, and the silica gel valve is opened only under the condition that the pressure difference exists at two sides of the silica gel valve to realize gas circulation, so that water vapor is prevented from entering the inside through the ventilation membrane, and condensed water aggregation in the closed cavity is reduced.
In order to solve the technical problems, the utility model adopts a technical scheme that: the moisture-proof and explosion-proof valve for the power battery pack comprises a main body and a push rod assembly, wherein the push rod assembly is arranged in a valve body and connected through a spring, the push rod assembly comprises an end cover and a push rod, the end cover is in threaded connection with the push rod, the end cover is connected with the push rod to form a ventilation channel, a silica gel valve block positioned on the ventilation channel is arranged in the end cover, an opening and closing seam is formed in the silica gel valve block, and the opening and closing seam is in a closing state when the air pressures at two sides of the silica gel valve block are balanced; when the air pressure at two sides of the silica gel valve plate is different, the opening and closing seam is in an open state, and a ventilated membrane positioned above the silica gel valve plate is arranged in the end cover.
In a preferred embodiment of the present utility model, the end cover has a step structure therein, and the silica gel valve plate is disposed on the step structure and fastened by a first interference compression ring.
In a preferred embodiment of the present utility model, a sealing ring is attached to the lower end of the breathable film, and the upper end of the breathable film is fastened through a second interference compression ring.
In a preferred embodiment of the present utility model, the end cover has an air outlet, the air in the air flow channel is discharged from the air outlet through a gas permeable membrane, and the end cover is adhered with a cover plate.
In a preferred embodiment of the utility model, the lower end of the end cover is provided with a threaded column, the upper end of the ejector rod is provided with a threaded hole, and the end cover and the ejector rod are in threaded connection through the threaded column and the threaded hole.
In a preferred embodiment of the present utility model, the lower end of the main body is provided with a sheath, and the sheath is provided with an exhaust hole communicated with the ventilation channel.
In a preferred embodiment of the present utility model, the lower end of the main body is provided with a mounting column structure, and the sheath is clamped in the mounting column in a matching way and forms an inner cavity.
In a preferred embodiment of the utility model, the ejector rod and the spring are positioned in the inner cavity, the lower end of the spring is connected to the ejector rod, and the upper end of the spring is connected to the main body.
In a preferred embodiment of the present utility model, the main body is provided with an exhaust channel, the end cover is located in the exhaust channel, and an inner sealing ring is embedded in the main body, and the inner sealing ring is in contact sealing with the end cover.
In a preferred embodiment of the utility model, the outer side of the main body is also provided with an outer sealing ring.
The beneficial effects of the utility model are as follows: according to the moisture-proof explosion-proof valve for the power battery pack, the two-way opening and closing of the silica gel valve is realized through the opening and closing seam on the silica gel valve, automatic control is realized based on the air pressure difference at two sides of the silica gel valve, the air flow is facilitated, and the air pressure balance at two sides of the silica gel valve is ensured.
According to the moisture-proof explosion-proof valve for the power battery pack, the silica gel valve plays a role in sealing the ventilation channel under the air pressure balance state, so that external steam entering through the ventilation membrane is blocked, and continuous entering of the steam is avoided.
Drawings
For a clearer description of the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the description below are only some embodiments of the present utility model, and that other drawings can be obtained according to these drawings without inventive effort for a person skilled in the art, wherein:
FIG. 1 is a schematic view of a moisture barrier explosion-proof valve for a power battery pack according to a preferred embodiment of the present utility model;
FIG. 2 is an exploded view of a moisture barrier explosion valve for a power cell pack;
the components in the drawings are marked as follows: 1. the main part, 11, exhaust passage, 2, sheath, 21, exhaust hole, 3, outer sealing washer, 4, interior sealing washer, 5, spring, 6, ejector pin subassembly, 61, end cover, 62, ejector pin, 63, ventilative passage, 64, silica gel valve block, 65, first interference clamping ring, 66, ventilated membrane, 67, sealing washer, 68, second interference clamping ring, 69, apron.
Detailed Description
The technical solutions in the embodiments of the present utility model will be clearly and completely described below. The structures, proportions, sizes, etc. shown in the drawings are shown only in connection with the present disclosure, and are not intended to limit the scope of the utility model, since any modification, variation in proportions, or adjustment of the size, etc. of the structures, proportions, etc. should be considered as falling within the spirit and scope of the utility model, without affecting the effect or achievement of the objective. Also, the terms "upper", "lower", "left", "right", "middle", and the like are used herein for descriptive purposes only and are not intended to limit the scope of the utility model for modification or adjustment of the relative relationships thereof, as they are also considered within the scope of the utility model without substantial modification to the technical context.
Referring to fig. 1 and 2, a moisture-proof explosion-proof valve for a power battery pack comprises a main body 1 and a push rod assembly 6. The lower extreme of main part 1 has sheath 2, and the lower extreme of main part 1 has the erection column structure, and sheath 2 cooperation joint is in the erection column and form the inner chamber. The outside of main part 1 still is equipped with outer sealing washer 3 before, and main part 1 installs on the power battery package, realizes the sealed between main part 1 and the power battery package through outer sealing washer 3.
The main body 1 is provided with an exhaust channel 11, the end cover 61 is positioned in the exhaust channel 11, the inner sealing ring 4 is embedded in the main body 1, and the inner sealing ring 4 is in contact sealing with the end cover 61. A ram assembly 6 is disposed within the valve body and is connected by a spring 5. The ejector rod 62 and the spring 5 are positioned in the inner cavity, the lower end of the spring 5 is connected to the ejector rod 62, and the upper end is connected to the main body 1. When the air pressure in the power battery pack is too large, the air pressure can push the end cover 61 and the ejector rod 62 to move upwards, and the end cover 61 opens the exhaust channel 11 of the valve body, so that the air in the power battery pack can be rapidly exhausted. When the external air pressure and the air pressure in the power battery pack reach balance, the spring 5 automatically resets, and the end cover 61 closes the valve body again. The basic principle of the explosion-proof valve is described above and will not be described in detail.
The ejector rod assembly 6 comprises an end cover 61 and an ejector rod 62, wherein a threaded column is arranged at the lower end of the end cover 61, a threaded hole is formed in the upper end of the ejector rod 62, and the end cover 61 and the ejector rod 62 are in threaded connection through the threaded column and the threaded hole. The end cap 61 and the ejector rod 62 are connected to form a ventilation passage 63. The sheath 2 is provided with an exhaust hole 21 communicated with the ventilation channel 63, and the air flow inside and outside the battery pack is realized through the exhaust hole 21 and the ventilation channel 63.
The end cover 61 is internally provided with a silica gel valve plate 64 positioned on the ventilation channel 63, the end cover 61 is internally provided with a step structure, and the silica gel valve plate 64 is arranged on the step structure and is fastened through a first interference compression ring 65. The silica gel valve plate 64 is provided with an open-close seam. The opening and closing seam is in a straight shape. The silicone valve plate 64 is tightly attached to the step structure so as to seal the ventilation channel 63 in the circumferential direction, so that the opening and closing slit serves as the only position through which the air flow can flow.
The end cover 61 is provided with a ventilation membrane 66 positioned above the silica gel valve plate 64. A sealing ring 67 is attached to the lower end of the ventilation membrane 66, and the upper end is fastened through a second interference compression ring 68. A cover plate 69 is attached to the end cap 61, and the cover plate 69 is attached to the end cap 61. The end cap 61 has an air outlet from which air in the air flow passage is discharged through the air permeable membrane 66. The ventilation membrane 66 is adhered to the sealing ring 67 through an adhesive tape, then is arranged in the end cover 61, is pressed by the second interference pressing ring 68, is positioned at the upper end of the silica gel valve plate 64, and plays a role in ventilation because the ventilation membrane 66 is an e-PTFE membrane.
When the air pressure of the two sides of the silica gel valve plate 64 is balanced, the opening and closing seam is in a closed state, and the air-permeable membrane 66 is always in an air flow exchange state, so that the silica gel valve plate 64 can play a role in moisture isolation, and external water vapor is prevented from entering the battery pack through the air-permeable channel 63. Once the pressure difference exists between the two sides of the silica gel valve plate 64, the opening and closing seam is opened, and the air flow at the high pressure side automatically flows to the low pressure side, so that the battery pack can be exhausted to the outside or the outside can be charged into the battery pack.
Compared with the prior art, the moisture-proof explosion-proof valve for the power battery pack is characterized in that the silica gel valve is arranged on the ventilation channel, the silica gel valve is opened to realize gas circulation only under the condition that pressure difference exists on two sides of the silica gel valve, water vapor is prevented from entering the inside through the ventilation membrane, and condensed water aggregation in the closed cavity is reduced.
The utility model and its embodiments have been described above by way of illustration and not limitation, and the utility model is illustrated in the accompanying drawings and described in the drawings in which the actual structure is not limited thereto. Therefore, if one of ordinary skill in the art is informed by this disclosure, the structural mode and the embodiments similar to the technical scheme are not creatively designed without departing from the gist of the present utility model.
Claims (10)
1. The moisture-proof and explosion-proof valve for the power battery pack comprises a main body and a push rod assembly, wherein the push rod assembly is arranged in a valve body and is connected with the main body through a spring; when the air pressure at two sides of the silica gel valve plate is different, the opening and closing seam is in an open state, and a ventilated membrane positioned above the silica gel valve plate is arranged in the end cover.
2. The moisture-proof and explosion-proof valve for the power battery pack according to claim 1, wherein the end cover is internally provided with a step structure, and the silica gel valve plate is arranged on the step structure and is fastened through a first interference compression ring.
3. The moisture-proof and explosion-proof valve for the power battery pack according to claim 2, wherein a sealing ring is attached to the lower end of the breathable film, and the upper end of the breathable film is fastened through a second interference compression ring.
4. The moisture-proof and explosion-proof valve for a power battery pack according to claim 3, wherein the end cover is provided with an air outlet, air in the ventilation channel is discharged from the air outlet through a ventilation film, and the end cover is stuck with a cover plate.
5. The moisture-proof and explosion-proof valve for a power battery pack according to any one of claims 1 to 4, wherein the lower end of the end cover is provided with a threaded column, the upper end of the ejector rod is provided with a threaded hole, and the end cover and the ejector rod are in threaded connection through the threaded column and the threaded hole.
6. The moisture-proof and explosion-proof valve for a power battery pack according to claim 1, wherein the lower end of the main body is provided with a sheath, and the sheath is provided with an exhaust hole communicated with the ventilation channel.
7. The moisture and explosion proof valve for a power battery pack according to claim 6, wherein the lower end of the main body is provided with a mounting column structure, and the sheath is clamped in the mounting column in a matching manner and forms an inner cavity.
8. The moisture-proof and explosion-proof valve for a power battery pack according to claim 7, wherein the ejector rod and the spring are positioned in the inner cavity, the lower end of the spring is connected to the ejector rod, and the upper end is connected to the main body.
9. The moisture-proof and explosion-proof valve for the power battery pack according to claim 8, wherein the main body is provided with an exhaust passage, the end cover is positioned in the exhaust passage, an inner sealing ring is embedded in the main body, and the inner sealing ring is in contact sealing with the end cover.
10. The moisture and explosion proof valve for a power battery pack according to claim 9, wherein an outer seal ring is further provided on the outer side of the main body.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320864540.9U CN220122031U (en) | 2023-04-18 | 2023-04-18 | Moisture-proof explosion-proof valve for power battery pack |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202320864540.9U CN220122031U (en) | 2023-04-18 | 2023-04-18 | Moisture-proof explosion-proof valve for power battery pack |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220122031U true CN220122031U (en) | 2023-12-01 |
Family
ID=88916809
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202320864540.9U Active CN220122031U (en) | 2023-04-18 | 2023-04-18 | Moisture-proof explosion-proof valve for power battery pack |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220122031U (en) |
-
2023
- 2023-04-18 CN CN202320864540.9U patent/CN220122031U/en active Active
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